Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash Flows from Operating Activities:
Net income	$ 768,266	$ 306,061
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	61,259	52,776
Depreciation	120,950	121,237
ESOP compensation expense	78,927	84,506
Deferred income tax benefit	(1,697)	(17,885)
Changes in assets and liabilities:
(Increase) decrease in trade accounts receivable	(888)	1,072,116
Increase) in income taxes receivable		89,667
(Increase) decrease in inventories	(77,755)	7,338
(Increase) decrease in prepaid expenses and other current assets	(233,166)	218,306
Increase (decrease) in accounts payable	831,816	(553,919)
Increase in accrued salaries and wages	65,431	73,348
Decrease in vacation accrual	(29,527)	(20,677)
Increase in other accrued expenses	57,022	80,892
Increase in payroll and other taxes withheld	4,493	56,547
(Decrease) increase in contract liabilities	(740,236)	17,380
Increase in income taxes payable	68,317
Net cash provided by operating activities	973,212	1,587,693
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(50,482)	(45,691)
Purchase of investment securities	(2,826,789)	(534,000)
Proceeds from sale/maturity of investment securities	1,120,000	488,000
Net cash used in by investing activities	(1,757,271)	(91,691)
(Decrease) increase in cash and cash equivalents	(784,059)	1,496,002
Cash and cash equivalents, beginning of period	8,104,060	6,802,712
Cash and cash equivalents, end of period	7,320,001	8,298,714
Supplemental Schedule of Cash Flow Information:
Income taxes paid	$ 150,000